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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#271321 | #7733. Cool, It’s Yesterday Four Times More | Terac | WA | 1ms | 9716kb | C++14 | 3.8kb | 2023-12-02 10:21:30 | 2023-12-02 10:21:31 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
namespace IO {
#if ONLINE_JUDGE
#define getc() (IS == IT && (IT = (IS = ibuf) + fread(ibuf, 1, IL, stdin), IS == IT) ? EOF : *IS++)
#else
#define getc() getchar()
#endif
const int IL = 1 << 21, OL = 1 << 21;
int olen = 0;
char ibuf[IL], *IS = ibuf, *IT = ibuf, obuf[OL];
inline int read() {
register char ch = getc(); register int x = 0, f = 1;
while(!isdigit(ch)) { if(ch == '-') f = -1; ch = getc(); }
while(isdigit(ch)) x = x * 10 + ch - 48, ch = getc();
return x * f;
}
inline double readdb() {
register char ch = getc(); register double x = 0, f = 1;
while(!isdigit(ch)) { if(ch == '-') f = -1; ch = getc(); }
while(isdigit(ch)) x = x * 10 + ch - 48, ch = getc();
if(ch == '.') {
register double b = 0.1;
ch = getc();
while(isdigit(ch)) x += (ch - 48) * b, b *= 0.1, ch = getc();
}
return x * f;
}
inline int readstr(char *s) {
register char ch = getc(); register int len = 0;
while(ch != '.' && ch != 'O') ch = getc();
while(ch == '.' || ch == 'O') s[++len] = ch, ch = getc();
return len;
}
inline void flush() { fwrite(obuf, 1, olen, stdout); olen = 0; }
inline void putc(register char ch) { obuf[olen++] = ch; }
template<class T>
inline void write(register T x) {
if(x < 0) obuf[olen++] = '-', x = -x;
if(x > 9) write(x / 10);
obuf[olen++] = x % 10 + 48;
}
} using namespace IO;
const int N = 1e3 + 10, kx[] = {0, 0, 1, -1}, ky[] = {1, -1, 0, 0};
int T, n, m;
vector<char> ch[N];
char s[N];
namespace ufs {
int fa[N];
int find(int x) { return fa[x] == x ? x : fa[x] = find(fa[x]); }
} using namespace ufs;
vector<int> id[N];
bitset<N> bs[N << 1][N << 1], t;
void MAIN() {
n = read(), m = read();
for(int i = 0; i <= n; i++)
for(int j = 0; j <= m; j++)
bs[n + i][m + j].reset(), bs[n - i][m - j].reset();
for(int i = 1; i <= n; i++) {
ch[i].resize(m + 5);
id[i].resize(m + 5);
readstr(s);
for(int j = 1; j <= m; j++)
ch[i][j] = s[j];
}
for(int i = 1; i <= n; i++) {
for(int j = 1; j <= m; j++)
id[i][j] = (i - 1) * m + j;
}
for(int i = 1; i <= n * m; i++) fa[i] = i;
int cnt = 0;
for(int i = 1; i <= n; i++)
for(int j = 1; j <= m; j++) {
if(ch[i][j] == 'O') continue;
cnt++;
for(int k = 0; k < 4; k++) {
int dx = i + kx[k], dy = j + ky[k];
if(dx > 0 && dx <= n && dy > 0 && dy <= m && ch[dx][dy] != 'O') {
int x = find(id[i][j]), y = find(id[dx][dy]);
if(x != y) fa[x] = y;
}
}
}
for(int i = 0; i <= n + 1; i++)
for(int j = 0; j <= m + 1; j++) {
if(!i || i == n + 1 || !j || j == m + 1) {
// if(i == 2 && j == 6) puts("TT");
for(int k = 1; k <= n; k++)
for(int l = 1; l <= m; l++)
if(ch[k][l] == '.') bs[n + i - k][m + j - l][id[k][l]] = 1;
}
}
for(int i = 1; i <= n; i++)
for(int j = 1; j <= m; j++) {
if(ch[i][j] == 'O') continue;
for(int k = 1; k <= n; k++)
for(int l = 1; l <= m; l++) {
if(ch[k][l] != 'O') continue;
bs[n + k - i][m + l - j][id[i][j]] = 1;
}
}
// for(int i = -n; i <= n; i++)
// for(int j = -n; j <= n; j++) {
// printf("%d %d\n", i, j);
// int x = 0;
// while((x = bs[n + i][m + j]._Find_next(x)) <= n * m) {
// printf("%d %d\n", (x - 1) / m + 1, (x - 1) % m + 1);
// }
// puts("");
// }
int ans = 0;
for(int i = 1; i <= n; i++)
for(int j = 1; j <= m; j++) {
if(ch[i][j] == 'O') continue;
t.reset();
for(int i1 = 1; i1 <= n; i1++)
for(int j1 = 1; j1 <= m; j1++) {
if(ch[i1][j1] == 'O') continue;
if(find(id[i][j]) == find(id[i1][j1])) {
t |= bs[n + i1 - i][m + j1 - j];
}
}
ans += t.count() == cnt - 1;
}
printf("%d\n", ans);
}
int main() {
T = read();
while(T--) MAIN();
return 0;
}
Details
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Test #1:
score: 100
Accepted
time: 1ms
memory: 7760kb
input:
4 2 5 .OO.. O..O. 1 3 O.O 1 3 .O. 2 3 OOO OOO
output:
3 1 0 0
result:
ok 4 lines
Test #2:
score: -100
Wrong Answer
time: 0ms
memory: 9716kb
input:
200 2 4 OOO. OO.. 2 3 OOO .O. 3 3 O.O OOO OO. 4 1 . . O O 1 2 .O 1 1 . 2 5 .OO.. .O.O. 2 1 O O 1 1 O 1 3 .OO 5 1 O O . O . 5 2 O. .. O. .O .. 5 3 ... ... .OO ..O OOO 3 5 ..O.O .O.O. .OO.O 5 2 .O OO O. O. .. 2 1 O O 3 5 .O.OO O...O ..OO. 1 5 ..... 5 1 O . O . . 5 3 OOO OO. .OO OO. O.O 2 1 O . 5 2 O. ...
output:
3 0 0 2 1 1 3 0 0 1 0 5 1 2 1 0 0 5 2 0 1 3 2 1 2 0 0 5 1 1 1 4 1 0 5 5 2 3 2 3 0 2 2 2 2 0 2 3 1 1 3 2 3 5 2 1 0 1 3 0 4 2 2 0 5 1 4 2 2 3 2 3 2 1 2 1 4 0 0 2 4 1 1 2 0 1 3 2 2 3 4 3 2 1 0 1 1 1 2 2 0 3 2 1 0 0 4 3 1 2 3 6 3 0 1 5 2 5 1 3 2 4 0 2 6 2 2 2 0 4 4 5 2 1 2 3 0 3 0 0 0 1 2 0 0 5 3 1 1 1 ...
result:
wrong answer 12th lines differ - expected: '7', found: '5'